Royal Enfield Classic 350 (21-24) DNA Air Filter R-RE35N21-01. These filters are washable and reusable and are custom designed to fit into your existing factory air box. For the ROYAL ENFIELD CLASSIC 350 22' model, only the R-RE35N21-01 filter is compatible and not the TC-RE35N21-S2 or R-RE35N21-S2-COMBO.
